Strap for Speedmaster Professional Missions Apollo 15

The lug width (lug size) of the Omega Speedmaster Professional 3597.18.00 is 20mm. This dimension is standard for classic sports chronographs and is the exact design specification for this model. The lug depth is approximately 5mm, allowing friction-free insertion of any strap with standard 20mm termination.

For the 3597.18.00 we recommend black or grey alligator to maintain formal character, or vegetable-tanned calf in cognac or tobacco tones to create sophisticated aesthetic tension. The NATO strap in nylon or heavy cotton remains valid for sports use. The choice depends on primary use: formal-elegant for leather, casual-versatile for NATO.

Changing the strap on any Omega is straightforward: you need a specific tool called a strap remover (pin remover) to push the horizontal suspension pins outward from inside the case. Once the pins are extracted, the old strap comes free. The new 20mm strap is positioned by aligning the shaped lugs with the lug holes and gently reinserting the pins until mechanical stop. For work on manual-wind movements such as the caliber 1861, it is advisable not to force and to contact a technical service if you encounter unusual resistance.

Yes, any strap with 20mm lug width is compatible with the 3597.18.00. Aftermarket straps of artisanal quality feature standard shaped lugs that fit perfectly into the original Omega lug holes. Mechanical compatibility is guaranteed; aesthetic compatibility depends on your choice of material and colour in relation to the tone of the brushed steel case.

The lifespan of a leather strap depends on the material and usage. Artisanal-quality vegetable-tanned alligator maintains structural integrity for 3–5 years of daily wear; vegetable-tanned calf lasts 2–4 years before requiring lining repair. Shell cordovan, initially stiff, lasts 5–7 years if properly maintained because the leather strengthens with wear. Regular maintenance (cleaning with a damp cloth, air drying) extends strap life regardless of material.